package com.leyou.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.lang.Nullable;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.CorsConfigurationSource;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.filter.CorsFilter;

import javax.servlet.http.HttpServletRequest;

@Configuration
public class LeyouCorsConfiguration {

    @Bean
    public CorsFilter corsFilter() {
        // 1.添加cors配置信息
        // 这里最好是从配置文件中去读取配置
        CorsConfiguration config = new CorsConfiguration();
        // 1) 允许的域，不要写*，否则cookie就无法使用了
        config.addAllowedOrigin("http://manager.leyou.com");
        // 2) 是否发送cookie
        config.setAllowCredentials(true);
        // 3) 允许的请求方式
        config.addAllowedMethod("OPTIONS");
        config.addAllowedMethod("HEAD");
        config.addAllowedMethod("GET");
        config.addAllowedMethod("POST");
        config.addAllowedMethod("PUT");
        config.addAllowedMethod("DELETE");
        config.addAllowedMethod("PATCH");
        // 4) 允许的头
        config.addAllowedHeader("*");
        // 5) Cookie的有效时长
        config.setMaxAge(3600L);

        // 2.添加映射路径，拦截一切请求
        UrlBasedCorsConfigurationSource configSource = new UrlBasedCorsConfigurationSource();
        configSource.registerCorsConfiguration("/**",config);

        // 3.返回对象
        return new CorsFilter(configSource);
    }
}
